Scientists often use gel electrophoresis to analyze similarities in DNA samples. A band appears when a gene is present in a sample. Bands shared on the same horizontal line represent shared DNA sequences. The gel image shows a comparison of samples from 7 organisms.
68e11d02-c011-4ed4-bbe8-cd1119bd6b20
Which statement is supported by the gel comparison?
a
Organisms 1 and 4 are most closely related by a common ancestor.
b
Organisms 3 and 5 are most closely related by a common ancestor.
c
Organisms 5 and 7 are most closely related by a common ancestor.
d
Organisms 3 and 6 are most closely related by a common ancestor.